Add `MethodFilter::CONNECT` #4886

Job	Run time
check	1m 22s
cargo-public-api-crates (axum)	32s
cargo-public-api-crates (axum-core)	17s
cargo-hack	3m 20s
check-docs	16s
cargo-deny check (advisories)	27s
cargo-public-api-crates (axum-extra)	27s
cargo-deny check (bans licenses sources)	25s
dependencies-are-sorted	18s
cargo-public-api-crates (axum-macros)	14s
Spell Check with Typos	7s
test-nightly	1m 22s
armv5te-unknown-linux-musleabi	19s
test-versions (stable)	2m 18s
test-docs	1m 12s
test-versions (beta)	2m 21s
test-msrv	1m 56s
wasm32-unknown-unknown	16s
	17m 29s

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